How come in anime they always scream out the name of the attack they're using

Well, no. You don't yell out your attacks, that would be quite stupid.

Martial Artists, when they attack, they scream/yell like "AYAH!" or "AH!" or something stupid to where they can not only breath fully out, but it gives them an extra burst of adrinaline to boost their attack and it intimidates their opponent.

that's what i meant, if you see my post i said nowhere that they yell the name of their attack